阅读说明：本技术 一种碳纳米管阵列的发电方法 (Power generation method of carbon nanotube array ) 是由 侯旭 熊辉 王苗 张运茂 谢歆雯 于 2019-04-23 设计创作，主要内容包括：本发明公开了一种碳纳米管阵列的发电方法,先制备碳纳米管阵列,再设计相应器件将碳纳米管阵列置于超纯水或电解质溶液中,控制电解质溶液离子浓度、外力对碳纳米管阵列的压缩频率和幅值,最终实现弯曲发电。本发明结合机械能转化过程和弯曲发电过程,在溶液中产生电动势,有别于传统的压电过程,是一种新型的基于碳纳米管阵列的纳米发电方法。(The invention discloses a power generation method of a carbon nano tube array, which comprises the steps of firstly preparing the carbon nano tube array, then designing a corresponding device, placing the carbon nano tube array in ultrapure water or an electrolyte solution, controlling the ion concentration of the electrolyte solution and the compression frequency and amplitude of an external force on the carbon nano tube array, and finally realizing bending power generation. The invention combines the mechanical energy conversion process and the bending power generation process to generate electromotive force in the solution, is different from the traditional piezoelectric process, and is a novel nano power generation method based on the carbon nano tube array.)

1. A power generation method of a carbon nanotube array comprises the following steps:

1) preparing a carbon nanotube array;

2) placing the carbon nano tube array in ultrapure water or electrolyte solution;

3) the carbon nano tube array is bent and deformed, and the carbon nano tube array and ultrapure water or electrolyte solution interact to generate electric energy.

2. The method of claim 1, wherein the carbon nanotube array is further compounded with an enhancer for enhancing mechanical properties of the carbon nanotubes.

3. The method of claim 1, wherein the reinforcement is a porous coating.

4. Use of the method of any one of claims 1 to 3 for generating electricity from an array of carbon nanotubes in the manufacture of a flexible wearable nano-electricity generating material or device.

5. A method of generating electricity from mechanical energy in an environment or a human body, comprising the steps of:

providing a carbon nanotube array power generation device, wherein the carbon nanotube array power generation device comprises ultrapure water or electrolyte solution and a carbon nanotube array placed in the ultrapure water or the electrolyte solution, and the carbon nanotube array is bent and deformed in the device under the mechanical action of a human body or the environment, so that the carbon nanotube array and the ultrapure water or the electrolyte solution interact to generate electric energy.

6. The carbon nanotube array bending power generation device is characterized by comprising a container, wherein the container contains ultrapure water or electrolyte solution and a carbon nanotube array placed in the ultrapure water or the electrolyte solution, one end of the carbon nanotube array is fixed on a first fixing unit, the other end of the carbon nanotube array is fixed on a second fixing unit, and the first fixing unit and the second fixing unit can move relatively to enable the carbon nanotube array to be bent and deformed.

7. The carbon nanotube array bend power generation device of claim 6, wherein: the relative movement of the first fixing unit and the second fixing unit includes a forward direction approaching or moving away from each other, or a parallel movement approaching or moving away from each other.

8. The carbon nanotube array bend power generation device of claim 6, wherein: the first fixing unit is a fixing plate, the second fixing unit is a sliding plate, one end of the second fixing unit is provided with a driving part, and the second fixing unit can move relative to the first fixing unit so as to be close to the first fixing unit or far away from the first fixing unit; the two ends of the carbon nano tube array are respectively jointed with the electrodes.

9. The carbon nanotube array bend power generation device of claim 8, wherein: the driving part is a push rod, one end of the push rod is fixed on the second fixing unit, and the other end of the push rod penetrates out of the container.

10. The carbon nanotube array bend power generation device of claim 6, wherein: the concentration of the electrolyte solution is in the range of 0.00001 mM-1M.

11. Use of the carbon nanotube array bent power generation device according to any one of claims 6 to 10 for the preparation of a flexible wearable nano power generation material or device.

Technical Field

The invention relates to a power generation method of a carbon nano tube array.

Background

With the depletion of traditional fossil energy sources, energy harvesting from the environment has been considered as an effective way to address the increasingly serious energy crisis. Converting mechanical energy stored in the environment and human body that is not fully utilized into electrical energy is attractive and promising. Meanwhile, with the rapid development of mobile electronic products, people increasingly demand convenient and sustainable power supply, mechanical energy is used for power generation, materials and devices with micro-nano structures are selected and designed, and mechanical energy which is not fully utilized in the environment and human bodies is collected and stored to supply power for electronic equipment. The green and sustainable nano-generator becomes the leading-edge research direction in recent years.

Many of the excellent properties of carbon nanotubes in recent years: the conductivity, mechanical strength, thermal stability, chemical stability, large specific surface area and the like make the material widely applied, but the application field still needs to be further widened at present.

Disclosure of Invention

One of the objectives of the present invention is to provide a method for generating power by using a carbon nanotube array, comprising the following steps:

1) preparing a carbon nanotube array;

2) placing the carbon nano tube array in ultrapure water or electrolyte solution;

3) the carbon nano tube array is bent and deformed, and the carbon nano tube array and ultrapure water or electrolyte solution interact to generate electric energy.

Preferably, the carbon nanotube array is further compounded with a reinforcer for enhancing the mechanical properties of the carbon nanotubes.

Preferably, the reinforcement is a coating film with pores, preferably electrospun fibers.

Another objective of the present invention is to provide an application of the above power generation method of carbon nanotube array in preparing flexible wearable nano power generation material or device.

Still another object of the present invention is to provide a method for generating electricity using mechanical energy in the environment or human body, comprising the steps of:

providing a carbon nanotube array power generation device, wherein the carbon nanotube array power generation device comprises ultrapure water or electrolyte solution and a carbon nanotube array placed in the ultrapure water or the electrolyte solution, and the carbon nanotube array is bent and deformed in the device under the mechanical action of a human body or the environment, so that the carbon nanotube array and the ultrapure water or the electrolyte solution generate interaction to generate electric energy.

The invention further aims to provide a carbon nanotube array bending power generation device, which comprises a container, wherein the container contains ultrapure water or electrolyte solution and a carbon nanotube array placed in the ultrapure water or the electrolyte solution, one end of the carbon nanotube array is fixed on a first fixing unit, the other end of the carbon nanotube array is fixed on a second fixing unit, and the first fixing unit and the second fixing unit can move relatively to bend and deform the carbon nanotube array.

Preferably, the relative movement of the first and second fixing units includes forward movement toward or away from each other, or parallel movement toward or away from each other. The moving toward or away from each other includes two modes that two fixing units move simultaneously or only one fixing unit moves and the other fixing unit is static.

In a preferred embodiment, in the bending power generating device, the first fixing unit is a fixing plate, the second fixing unit is a sliding plate, one end of the second fixing unit is provided with a driving part, and the second fixing unit can move relative to the first fixing unit so as to be close to or far away from the first fixing unit; the two ends of the carbon nano tube array are respectively jointed with the electrodes.

In a preferred embodiment, the driving part is a push rod, one end of the push rod is fixed on the second fixing unit, and the other end of the push rod penetrates out of the container.

Preferably, the electrolyte solution has a concentration ranging from 0.00001mM to 1M. Preferably, 0.0001mM, 0.001mM,0.01mM, 0.1mM, or 0.0001nM to 10nM, preferably 0.001nM, 0.01nM,0.1nM, 1nM may be used. The electrolyte is preferably a metal salt solution.

The invention also provides application of the carbon nanotube array bending power generation device in preparation of flexible wearable nanometer power generation materials or devices.

The bending power generation method of the carbon nanotube array is based on the unexpected discovery of the applicant in the experimental process. The nano-power generation method can generate power, is possibly based on the theory of double electric layers, can generate electromotive force in solution, combines a mechanical energy conversion process and a bending power generation process, is different from the traditional piezoelectric process, and is a novel nano-power generation method based on the carbon nano-tube array.

The invention provides a novel device for generating power by efficiently utilizing weak mechanical energy in environment or human body based on the discovery. The device can collect and store various types of weak machines which are generated by environment or human body movement and are not fully utilized, so that the carbon nanotube array can be bent and deformed, and the bent array further interacts with the solution to generate and output electric energy. More importantly, the carbon nanotube array has good conductivity, mechanical strength, thermal stability and chemical stability, and simultaneously has a large specific surface area, and can well interact with water molecules and ions in a solution to generate electric energy. The effect enables the carbon nano tube to have huge application potential in the aspect of preparing flexible wearable nano power generation materials, and the carbon nano tube can be used as materials of nano power generator devices.

The invention has the beneficial effects that:

(1) the bending power generation voltage of the carbon nano tube reaches hundreds of millivolts;

(2) the working condition of the system is normal temperature and normal pressure;

(3) the used liquid is simple and easy to obtain, and the raw materials are low in price;

(4) the system has long electric energy output time and stable work;

(5) devices required by the system are simple and easy to operate;

(6) by adding the liquid mobile phase, the generator and the power generation device can be recycled;

(7) the system is light and flexible to modify, and has huge application potential in the aspect of preparing a flexible wearable nano power generation device;

(8) the environment is not polluted, and the environment is protected;

(9) it is possible to generate practical electricity only by using weak mechanical energy of various forms which is not fully utilized in the environment or human body motion.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic diagram of a carbon nanotube array bending power generation mechanism.

FIG. 2 is a schematic view of a nano-meter power plant.

FIG. 3(a-b) is a schematic diagram of an electrospun carbon nanotube array film; (c-d) a real object diagram.

Fig. 4(a) SEM image of the surface of electrospun carbon nanotube array film; (b) and (3) SEM images of the side surfaces of the electrostatic spinning carbon nanotube array films.

Detailed Description

Referring to fig. 2, the bending power generation apparatus of a carbon nanotube array in ultrapure water or an electrolyte solution includes: the device comprises a push rod 1, a push rod sliding liquid storage tank 2, a sliding porous plate 3, a platinum mesh electrode 4, a carbon nanotube array 5, a fixed porous plate 6 and a liquid storage tank 7.

The device comprises a cavity, a push rod sliding liquid storage tank 2 and a liquid storage tank 7 are respectively arranged on two sides of the cavity, the two liquid storage tanks are communicated and ultrapure water or electrolyte solution is the same; the cavity is internally provided with a sliding porous plate 3 and a fixed porous plate 4. The fixed porous plate 4 is fixed with the wall of the cavity, and the sliding porous plate 3 can slide left and right along the cavity so as to be close to or far away from the fixed porous plate 4. The right end of the push rod 1 is fixedly connected with the left side of the sliding porous plate 3, and the left end of the push rod extends out of the cavity.

Two ends of the carbon nano tube array 5 are respectively tightly attached to the platinum mesh electrodes 4 and are arranged between the sliding porous plate 3 and the fixed porous plate 6, and ultrapure water or electrolyte solution is added into the cavity to ensure that the carbon nano tube array 5 is completely immersed in the solution. At this time, the push rod 1 is pushed at a certain frequency, and the push rod 1 drives the sliding porous plate 3 to compress the carbon nanotube array 5 at a certain frequency, so that the carbon nanotube array 5 is bent and restored at a certain frequency, thereby acting with ultrapure water or an electrolyte solution in the tank.

In this embodiment, the sliding porous plate 3 and the fixed porous plate 6 are in relative motion in the forward direction, but in other embodiments, the sliding porous plate 3 can also be in relative motion in parallel, i.e., the fixed porous plate 6 is not moved, but the sliding porous plate 3 moves back and forth.